KB4090007: Intel microcode updates

Summary

Intel Microcode updates around the following products (CPUs) have been revised. We recommend that you take this latest update to stay current:

Nehalem EP, Nehalem WS

Lynnfield

Lynnfield Xeon

Arrandale

Clarkdale

Clarkdale Xeon

WestmereEP, WS

Intel recently announced that it has completed its validations and has started to release microcode for newer CPU platforms around Spectre Variant 2 (CVE 2017-5715: “Branch Target Injection”). This update includes microcode updates from Intel for the following CPUs.

This update is a stand-alone update that's available through the Microsoft Update Catalog and targeted to Windows 10, version 1709 (Fall Creators Update) and Windows Server 2016, version 1709 (Server Core). This update also includes Intel microcode updates that were already released for these operating systems at the time of Release To Manufacturing (RTM).

We will offer additional microcode updates from Intel through this article for these operating systems as they become available to Microsoft.

Please make sure that mitigation against Spectre Variant 2 is enabled by applying the update through KB 4078407 or through the registry settings that are documented in the following articles:

Consult with your device manufacturer and Intel via their websites regarding their microcode recommendation for your device before applying this update to your device.

Known issues

Microsoft is not aware of any issues that affect this update currently.

How to obtain and install the update

Method 1: Windows Update

To download and install this update, go to Settings > Update & Security > Windows Update and then select Check for updates. If Windows Update says your device is up to date, you have all the updates that are currently available.

References

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.